The Sentry Transmitter 4 Button Self Learn is a 403mHz transmitter with the capability of "learning" a button from an existing remote. It supports the learning of binary, trinary and French transmitters.

• Four-button
• Learns Binary, Trinary, and French Remotes
  
  

  Sentry – 4 Button Tx Learn (403)

  Power Source: Internal 12V Battery (Type 23A)
  Frequency: 403.55MHz
  Transmission power: 350mW
  Current consumption: 9mA active
  Physical Size: 65 x 32 x 14mm
  Weight: 30g
  Storage Temp: -10°C to +55°C
  Operating Temp: 0°C to 40°C